SMTP Server required for sending mail
I have the small mail application for sending mail to my client. In this, i am using mail.smtp.host properties as my proxy m/c name. will it work or shall i can configure any other smtp server for sending mail

You cannot Use your proxy server as your smtp server. Both are different. SMTP server is your mail server. Give the IP of your mail server and things will work fine. The Sample code for mail server part is